Koyuki Honda, like many of her classmates, is looking forward to her graduation ceremony. However, unlike her friends, Koyuki has no family to care to because her lone family member—her brother—died years ago. While visiting his tomb, she encounters two brothers, Kiri and Victor Putin, who are following a weird monster. They try to reassure her that they are just actors filming a movie; Victor, on the other hand, piques Koyuki's interest in the old legend of the clock tower at the cemetery: if you make a wish under the clock tower at midnight during a full moon, time will turn back, allowing you to reclaim what you have lost. When Koyuki decides to make her wish, she discovers the horrible truth: the mythology is a deception for time monsters known as "Horologues."